The Regulatory Flexibility Act (RFA) requires
federal agencies to assess a proposed regulation's impact on small businesses,
small organizations, and small governmental jurisdictions. Section 610 of
that law also requires these agencies to conduct periodic reviews of codified
regulations that have significant economic impacts on small entities. This
review, commonly called a "610 Review," must be conducted by a rule's tenth
anniversary. The Environmental Protection Agency (EPA) provides public notice
of 610 Reviews in its Regulatory Agenda, which is published twice a year
in the Federal Register.

All aspects of the Criteria, including those applicable to large landfills,
were open for comment from all interested parties. The comment period closed
February 29, 2000.